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Trans-Neptunian object

2016 GA399

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(2016 GA399)

Where is it now

Distance from Sun
32.926 AU
True anomaly
328.08°
Distance from Earth
33.703 AU
As of
17 October 2026

Two-body Kepler propagation — accurate to ~0.1% for major planets over decades, less so for highly-perturbed bodies. Use JPL Horizons for high precision.

Sun Earth — 0.996 AU from the Sun Earth 2016 GA399 — 32.926 AU from the Sun 2016 GA399
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2016 GA399 is 33.703 AU from Earth today (4.7 light-hours).

In the sky

Right ascension
16h 04m 35s
Declination
-06° 43′ 47″
Constellation
Ophiuchus
Distance from Earth
33.71 AU
Elongation from the Sun
37.89° — near the Sun — look low at dusk or dawn

Visible from both hemispheres.

From your location

See how high it is right now, whether it is up after civil twilight, and when it rises and sets where you are.

How do I find my coordinates?

Google Maps on a computer

  1. Right-click the spot where you'll be observing.
  2. The first line of the menu is the coordinates, e.g. 51.50722, -0.12758 — click it and they're copied.
  3. Paste them above.

Google Maps on a phone

  1. Press and hold the spot to drop a pin.
  2. The coordinates appear in the search bar (or on the pin's card) — tap to copy, then paste above.

A full Google Maps link works too, but the short maps.app.goo.gl share links don't carry coordinates — copy the numbers instead. We round to about a kilometre; that's all the sky calculation needs.

Know your what3words address? Paste it, e.g. ///filled.count.soap. This is optional — the three words are sent to what3words to convert them, and we don't store the address or the result.

Your location stays in your browser and is sent only for this calculation. Using a what3words address is optional; if you do, the three words go to what3words to be converted and we don't record them. Set a location first, then you can save an email alert for this object. See our privacy policy.

Two-body approximation, good to about a degree for the planets — enough to find the constellation and know whether it is up.

Orbital elements

Semi-major axis
40.202 AU
Eccentricity
0.2018
Inclination
16.74°
Orbital period
254.9 years
Perihelion
32.091 AU
Aphelion
48.314 AU
Longitude of ascending node
118.31°
Argument of periapsis
153.95°
Epoch · J2000
2457464.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 12,096.6 LD
31.083 AU
Tisserand (Jupiter)
5.344

Orbit quality

Orbit very uncertain — the object may be effectively lost (uncertainty code 9).

Observations used
16
Data arc
26 days
First observed
9 March 2016
Last observed
4 April 2016
Residual RMS
0.14 ″
Solution · Otto Matic
17 September 2025

Visual & observation

Absolute magnitude (H)
9.31

Discovery & classification

TNO

Sources